Outstandig!
Hands down the best airport I own (and I have quite a collection by now). Absolutely amazing attention to detail. The airport really comes to life when you get to the parking and see passengers move inside the terminal.
I feared that so much detail would bring my FPS to a crawl, but that is not the case. The scenery is fluid at any moment.
Only issue: I flew around in drone mode inside the terminal for over 10 minutes, and could not find the piano player I had heard about… need to do another search tomorrow :-)
There are so many great airports being released at the moment, that feature extreme detail but manage to stress out our hardware far less than we might have imagined. Jo Erlend Sund is arguably one of the top developers currently on the MSFS circuit. His Brussels is a masterpiece, although it wasn't exactly easy on resources. Oslo manages to better Brussels, in almost every way, while actually performing more favourably on my system. Granted, I'm pretty top-end (Ryzen 7800X3D, Radeon 7900XTX, 48gb RAM) but more detail should in theory mean less performance. It normally takes 3-4 years for developers to get the most of a new software engine, and we're now I think at the pinnacle of what can be achieved in the sim.
Having said all that, I probably wouldn't recommend this scenery to anyone with anything less than an upper-mid-range system.
So, how good is it? Well, put simply, everything is first-class: the textures, the modelling, the custom ortho, the numerous animations (passengers, apron vehicles, trains, advertising screens, etc.), the ambient interior sounds... it's all rather sublime. However if I had to pick fault, the main landside concourse interior is a touch bland (compared to the rest of the terminal) and I'd like to have seen a little more attention paid to the general landside areas. But since these places are seldom seen by pilots, it really isn't too big an issue. They're far from bad — it's just that everything else is SO comparatively good!
I'm often getting well upward of 40fps with moderate AI traffic and heavy weather, but bear in mind that, despite being Norway's busiest airport, it isn't 'busy' in the EHAM/EDDF/LFPG/EGLL sense. It's about on a par with airports such as EBBR, EDDB and LEMG.
The asking price is predictably high but this is the sort of airport that can easily command its price, because it's worth it. There's not a lot to dislike, but plenty to like — from the guy in the terminal playing 'Für Elise' on his grand piano, to the myriad of ground service vehicles buzzing around, this is about as life-like as a MSFS airport can feel.
Definitely one of the top five airports so far this year... and a worthy contender for the coveted number one spot!